Bodaks have played a major role in two campaigns I've been in - one as a DM, the other as a player.
In the game I Dm'd, the party encountered a bodak in an old mansion. One of the PCs ran into the room, cast their eye over it and immediately kealed over dead, having failed his save. The bodak took out a second character before it was destroyed. After some quick research, the PC's discovered what happens to those killed by bodaks and tied their fallen comrades bodies to stakes, so that when they awoke the following day, they would sizzle agonisingly under the sun! It was particularly memonrable for two PC's standing in the hall and saying,
if anything comes out of that room, we're going to shoot it with our cross bows and jump out of the window. So, the cleric retreats out of the room, gets hit by a couple of bolts and then watches two of his comrades leap out of a first floor window (which was fine for the monk, but not so good for the druid...)
In a completely catatrophic encounter with Bodaks, I was playing a wizard and we encountered one in an ancient dwarf citadel, now filled with undead. To say it was disastrous is to seriously underplay it. The party got split up, so rather than encounter the bodak at full strength, we ended up going in 1's and 2's. The first one in looked up, gasped and died. The second hang around until my character and a sorcerer arrived. The sorcerer was just in front of me, ran in the room, looked up, gasped, and died. So, myself and this other character (I think he was a fighter) took it on, as best we could, while waiting for the heavily armored cleric to catch up. I can't remember how many saves I had to make in that fight - over 10, with my Fort save being the worse - while slowly picking it off with my spells. The fighter soon caught its gaze one time too many and also died, leaving me alone. I made save after save, until the cleric finally arrived and we killed it.
So we retreat to recoup and find more comrades and return with more-or-less a whole new party, straight back to the room where we'd defeated the bodak - now to find more! Once again, two more comrades fell and my wizard continued to defy the odds and survive. We managed to kill a couple, but fled, returning later for a third time. After having finally researched our enemy, we returned and finally defeated them (I don't think we lost anyone third time around, though could be wrong - the number of character deaths started to get a little fuzzy around this point).
My wizard was the only survivor of those who had initially set foot in that room. I really don't know how he survived, as he had the worst Fort save of everyone (even the fighter who only needed a 1 or 2 on his save died!). Not an encounter quickly forgotton. And you know what - it was a lot of fun
Edit: meant to add, so keep it as it is!